verb (v)

• express strong disapproval of; deplore(verb.communication)

  source: wordnet30
• belittle(verb.communication)

  Example:
  The teacher should not deprecate his student's efforts.
  

  Synonym:
  depreciate, vilipend
  

  source: wordnet30
• To pray against, as an evil; to seek to avert by prayer; to desire the removal of; to seek deliverance from; to express deep regret for; to disapprove of strongly.(verb)

  source: webster1913